A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole ha

Question

A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

Options:

A . (ph - dh)/ph

B . (ph - dh . dt/2)/ph

C . (ph - dt)/ph

D . (ph - dh)/dh

Answer: Option C

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